Hair straightener



FIG. 1 is a perspective view of a hair straightener, showing my design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side elevation view thereof, the opposite side being a mirror image thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a perspective view of another embodiment of the hair straightener, showing my design;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a side elevation view thereof, the opposite side being a mirror thereof; and,

FIG. 10 is a front elevation view thereof.

The broken line showing of the interior structure of the hair straightener is included for the purpose of illustrating portions of the article and forms no part of the claimed design. 

I claim the ornamental design for a hair straightener, as shown and described. 